Видео с ютуба Mathematics Tricks For Daily Use

5 простых математических приёмов для быстрых вычислений | Математические приёмы на каждый день | ...

How to Calculate Faster than a Calculator - Mental Math #1

Mental Addition and Subtraction Tips — Math Tricks with Arthur Benjamin

5 Simple Math Tricks For Fast Calculations | Mathematics Tricks for Daily Use | ChetChat Math Tips

Mental Math Tricks - Addition, Subtraction, Multiplication & Division!

How to study MATH so FAST that it feels ILLEGAL

How to Actually Get Better at Math

Cool Multiplication hack that will blow your mind!